First impressions, this cooler is massive compared to the factory unit. Our engineers weren’t kidding when they mentioned that the size increase would be significant. You will notice two dimples on the intercooler outlet. They are predefined spots for injection systems such as methanol, or for a temperature/boost pressure sensor. These bungs are not predrilled, but they provide extra material thickness for those who wish to drill and tap the port. Pretty slick! You can also see from these images that our core is a solid bar-and-plate design. Now, let’s compare the core thickness of the factory intercooler to the Mishimoto unit.

Yes, you are seeing that correctly; the Mishimoto intercooler core is twice as thick as the factory intercooler. Check out a few shots of the prototype in raw aluminum form before we painted it for video use.

Not only is the core significantly enlarged, but we’ve also increased the size of the inlet and outlet, which should provide a nice improvement in airflow. We are including adapter boots that allow you to mate this cooler to the factory piping.

Mishimoto 6.7L Cummins raw intercooler prototype inlet

Now it was time to install this prototype to check for any fitment concerns. On this same day, we were test fitting our aluminum radiator prototype as well. Check out a few shots of the radiator installed!

This cooler looks massive even after being installed on the truck. So far, all our mounting points were lining up perfectly. Our end tanks slid through the radiator core support just like the factory unit did. Next up, we installed the AC condenser/transmission cooler unit into place.

The last image shows our branding/logo placed on the driver’s side end tank. On our recent products, we have been placing our brand in discreet locations so as to keep our products looking like OEM.

The condenser unit also fit perfectly with the mounting points on the intercooler. We reassembled the front end of the truck to ensure that none of the body components touched the larger Mishimoto cooler. Next time, we will be hooking up our data-collection sensors and making some dyno pulls to see how this cooler performed!

Thanks for reading!

Interested in purchasing this Cummins Intercooler? Check out our product page for more information!